拔牙后，牙槽窝内肉芽组织形成时间是
A．三天
B．一周
C．一个月
D．两个月
E．三个月
参考答案：B
. In my opinion, you can widen the _____ of these improvements through your active participation.
A．dimension
B．volume
C．magnitude
D．scope
________ the famous actress wants to offer to her fans is honesty and happiness.
A．Which
B．What
C．That
D．Whom
